pearson



(No Model.) 2 Sheets-Sheet 1. M. H. PEARSON.

SEWING MACHINE.

No. 279,500. Patented June 12, 1883.

WmJJes wdM (No Model.) 2 Sheets-Sheet 2. Q

M. H. PEARSON.

SEWING MACHINE.

No. 279,500. Patented June 12,1883.

gk R N. PETERS. PlMa-Wqrapben Wahinginn. 0 C.

UNITED STATES PATENT O FICE.

'MARSHALL H. PEARSON, OF LEEDS, COUNTY OF YORK, ENGLAND.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 279,500, dated June 12, 1883.

Application filed November 2' 7, 1882, (No model.) Patented in England October 18. 1882. No. 4,554.

T at whom it may concern Be it kn own that I, MARsHALL HENRY PEAR- soN, of Leeds, in the county of York, in that part of the Kingdom of Great Britain and Ireland called England, have invented certain new and useful Improvements in Sewing-Machines; and I do hereby declare that the following is a full, clear, and exact description of the same.

The improvements in sewing-machines forming the subject-matter of the present application for Letters Patent will be fully set forth and claimed in the following description and claims.

In thedrawings hereunto annexed similar letters of reference indicate like parts, and Figure 1 is a side elevation of a .machine embodying my invention. Fig. 2 is a front elevation of Fig. 1. Fig. 3 is a diagram showing the construction of cam for operating the needlebar, and illustrating the operation of said cam in imparting a lateral motion to the needle-bar. Figs. 4 and 5show the configuration of cams. Fig. 6 is a plan or face view of the shuttle, and Fig. 7 is asectional elevation on line a." 00, Fig. 6. Fig. 8 is a' section of the bush in which the shuttle-carrier operates,

showing also the said shuttle-carrier in elevation within it. Fig. 9 shows in elevation the ram by which the shuttle-carrier is operated. Figs. 10 and 11 are details of construction.

Before proceeding with the description, I would remark that although the outward configuration of the machine illustrated in the drawings hereunto annexed is very dissimilar to that of my hereinbefore-mentioned previous invention, yet upon closer examination it will be found that the combinations of parts or elements by which various functions of the machine are performed are substantially the same, with the exception of those improvements which form the subject of the present invention. It will therefore not be necessary to describe the parts as fully as in the specifications of my said previous invention.

Letter A is the frame. B is the main shaft, carried in journals formed in the frame A. On the end of the said shaft a disk, 0, is secured, provided with a cam-shaped periphery, as shown in Fig. 3, where the dotted line shows the amount that the disk is deficient of being a true circle; also the configuration of the cam-groove D.

To the upper front extension of the frame A is pivoted, at E, a swinging arm, F, configurated as shown, to form a guide to a slide bar, G, operated to move up and down by the cam-groove D, as follows:

To the lower front end of the frame A is attached a bracket, H, in which is secured the pivot I, upon which an arm, K, swings. This arm is provided with a pin, L, at its other extremit which engages with the cam-groove D in the disk 0, causing the inner extremity of the arm K to swing up and down thereby.

To K is pivoted, at a, link, I), having its lower extremity pivoted 011 the back of the slide G, and by this the motions of the arm K.

are transmitted to the slide G, which carries the needle h in a grip, c, secured at its lower extremity. d is a similar grip for holding anawl, 2', attached also to the slide G, but'enabled to slide horizontally by means of a slot, f, and pin g, so that it may be adjusted in po sition to place the awl at a distance from the needle to agree with the length of the stitch being formed.

Within the lower portion of H is a recess in which, as shown in Fig. 10, is placed a spring,

k. This presses the arm F in the direction of the arrow, and keeps the pulley I (see Figs. 2 and 3) pressed upon the periphery of the cam C, so that the armFand other parts connected therewith are caused to swing, as indicated by the dotted lines, to cause the needle and awl to return after they have moved the work being stitched the required amount forward for the next stitch, so that when the part of the periphery of O that is a portion of a true circle is engaged with the pulley Z the arm F and parts are held in the position shown by solid linesin Fig. 3, and whenthe reduced part ofthe said periphery comes in contact with the pulley Z they move by the spring 7.: to the position shown in dotted lines in Fi 3. To cause the stitches to 'be adjusted in length a set-screw, m, is provided and screwed into the lower front extension of the frame A, (see Figs. 2 and 11,) so that as the arm F swings its proj ection it comes in contact with the end of the 1100 screw on and prevents the arm from swinging more than the desired amount.

0 is alock-nut for securing the screw in any desired position.

' The shuttle p is carried in a chamber, which in itself is similar to the chamber in my previous invention; but the manner of forming and supporting the chamber is changed, as also the means by which the shuttle is rotated.

q is a bush fitted into the front baseextension of A, provided with an enlarged head, '1 in which the shuttle-chamber is formed. 8 is a hinged cover provided with an opening, 2, so situated that it agrees with an opening, a, in the shuttle when the shuttle is for the illstant at rest at the end of its rotation. These openings 2'; and to enable the operator to see into the shuttle for the purpose of seeing when the cop of thread therein contained will be exhausted, and thus prevent making a number of blind stitches, or operations that would be stitches if there were thread.

The head or disk c and projection a, by which the shuttle is held and rotated, are the same as in my said previous invention, only to the head a; is attached or made,in one therewith, a tube, bush, or neck, I). (See Fig. 8.) In this neck is cut a spiral groove, 0, of about seven eighths part of a whole turn or revolution, and the bore of the neck (represented by the dotted lines (1) extends, preferably,through the head 1;, so that by passing a non-revolving ram, 0, which slides in the bore within the neck, and providing said ram with aprojection, f, to fit within the groove 0, the neck b, head '1), and projection a are caused to revolve an equal amount at each stroke of the ram backward and forward. The ram (see Figs. 1 and 9) is operated by a rod, attached on the end of a lever, h, which lever is operated by a cam, i, secured on the main shaft B. The bush (1 is secured in place by pinching-screws passing through A, or any other desired ordinary means.

To secure the neck I) in the bush q it is provided with a collar, secured by a set-screw passing through both.

The shuttle in this case is in general configuration and construction similar to that of my said previous invention, but having the following improvements, viz: The opening a and its use have already been described. Next is an improved formation of tension for the thread, which consists oi a spring, 1, having an inclined end, m, to agree with an inclined passage, 01, formed within the projection, 0, of the cover or lid 0. This spring is held in place by a screw, 1), by tightening or slackening which the spring is caused to act with greater or less force upon the thread in nipping it be tween the surface of the spring and that of the passage 11/. The projection o in this case is a plain one of about the form of a semi-sphere.

In the present invention the ordinary presser-foot, q, is attached directly on the presserbar 1', which is operated exactly in the same way as in my said previous invention by a spring, at, plate I)", lever 0', having toe (Z and cam f is the distance or retaining fulcrum to the plate b and g is the spring for insuring the return of 1) upon f h is alever arranged to grip the presserbar 1", as in my previous invention, being actuated by the cam i Both the levers are pro vided with ordinary proj eetions extending from them, and reaching over for their re spective cams to operate them, as well as being provided with returning-springs k and Z.

m'iis an ordinary arrangement of lever for raising the presser-bar r and presser-foot q and retaining it in its raised position by re cess of engaging with the roller 0 'To pre vent the presser-bar from being able to turn about out of its proper position it has attached rigidly to it a plate, 3)", which receives through an opening formed in it a steady-pin, (1 secured in A.

The spool of thread a is situated as shown. The thread is passed through the ordinary spring-tension, 1' and is brought down through the eye s in the bar 1?, and thence over the pulley at the end of the rod 10 which rod, as shown, is attached to the take-up lever a, operated by the cam b upon the main shaft B.

If the machine is used with hot wax or other solution, instead of passing the thread through the eye 8 it will be passed through a wax pot secured in about the position of the eye 3 \Vhat I claim, and wish to secure by Letters Patent, is as follows:

1. The combination of the swinging arm F,

provided with-pulley Z and slide G, spring k,

link I), arm K, and disk 0, having peripheral cam configuration and camgroove 1), the whole constructed, arranged, and operated substantially as described.

2. The eombinati on of a rotatin shuttle provided with a cover, 0", having opening u, with a a shuttle-chamber provided with a cover, .9, having opening t, substantially as and for the purposes set forth.

MARSHALL HENRY PEARSON. 

